Agip S.p.a.

Eniricerche S.p.a.

Eniricherche S.p.a.

Fabrizio Stroppa

Alberto Del Bianco

Giuseppe Bellussi

Maurizio Brunelli

Alberto Delbianco

Pierferdinando Ferrari

Process for the dissolution of asphaltene sediments in oil wells which consists in introducing a solubilizing composition for the above asphaltenes into the oil wells, characterized in that the solubilizing composition comprises:

Composition effective in removing asphaltenes

Particular hydrocarbon composition constituted by saturated species, alkylbenzenes and polyaromatics, useful for dissolving asphaltenic residues present in oil wells.

Effective hydrocarbon blend for removing asphaltenes from oil wells

Particular hydrocarbon composition constituted by saturated species, alkylbenzenes and polyaromatics, useful for dissolving asphaltenic residues present in oil wells. Such useful hydrocarbon blends for dissolving asphaltenic residues present in oil wells, are characterized in that said blends are essentially constituted by a composition selected from those which, on a ternary chart, in which the vertex (A) represents 100% of polyaromatics with z&lt;-6, the vertex (B) represents 100% of saturated species, and the vertex (C) represents 100% of alkylbenzenes with z=-6, are comprised between:

Effective hydrocarbon blend for removing asphaltenes

Alkylarylethers are produced according to the invention using phenols and ethers of aliphatic alcohols as the starting materials, in the presence of BPO.sub.4.

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San Giuliano Milanese, Italy

Fabrizio Stroppa